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//! Generates `assists.md` documentation.
use std::{fmt, path::PathBuf};
use xshell::write_file;
use crate::{
codegen::{extract_comment_blocks_with_empty_lines, Location, PREAMBLE},
project_root, rust_files, Result,
};
pub(crate) fn generate_diagnostic_docs() -> Result<()> {
let diagnostics = Diagnostic::collect()?;
let contents =
diagnostics.into_iter().map(|it| it.to_string()).collect::<Vec<_>>().join("\n\n");
let contents = format!("//{}\n{}\n", PREAMBLE, contents.trim());
let dst = project_root().join("docs/user/generated_diagnostic.adoc");
write_file(&dst, &contents)?;
Ok(())
}
#[derive(Debug)]
struct Diagnostic {
id: String,
location: Location,
doc: String,
}
impl Diagnostic {
fn collect() -> Result<Vec<Diagnostic>> {
let mut res = Vec::new();
for path in rust_files() {
collect_file(&mut res, path)?;
}
res.sort_by(|lhs, rhs| lhs.id.cmp(&rhs.id));
return Ok(res);
fn collect_file(acc: &mut Vec<Diagnostic>, path: PathBuf) -> Result<()> {
let text = xshell::read_file(&path)?;
let comment_blocks = extract_comment_blocks_with_empty_lines("Diagnostic", &text);
for block in comment_blocks {
let id = block.id;
if let Err(msg) = is_valid_diagnostic_name(&id) {
panic!("invalid diagnostic name: {:?}:\n {}", id, msg)
}
let doc = block.contents.join("\n");
let location = Location::new(path.clone(), block.line);
acc.push(Diagnostic { id, location, doc })
}
Ok(())
}
}
}
fn is_valid_diagnostic_name(diagnostic: &str) -> Result<(), String> {
let diagnostic = diagnostic.trim();
if diagnostic.find(char::is_whitespace).is_some() {
return Err("Diagnostic names can't contain whitespace symbols".into());
}
if diagnostic.chars().any(|c| c.is_ascii_uppercase()) {
return Err("Diagnostic names can't contain uppercase symbols".into());
}
if diagnostic.chars().any(|c| !c.is_ascii()) {
return Err("Diagnostic can't contain non-ASCII symbols".into());
}
Ok(())
}
impl fmt::Display for Diagnostic {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
writeln!(f, "=== {}\n**Source:** {}\n{}", self.id, self.location, self.doc)
}
}
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